The aim of medical image segmentation is to facilitate the analysis of pathological or anatomical structural changes in patients. This often plays a critical role in computer-aided diagnosis and treatment [1]}. Popular image segmentation tasks include retinal vessel [2]}, [3]}, [4]}, [5]}, optic disc [6]}, [7]}, [8]}, brain tumor [9]}, lung [10]}, and skin lesion segmentation [11]}.
